Why do I get a connection refused?

Question

I am trying to get some data from openweathermap.org via java, but when I run the code I get a ConnectionException.

My code is:

public static void openweathermapTest1() {
    String uri = "http://openweathermap.org/data/2.1/find/station?lat=55&lon=37&cnt=10";
    ClientConfig config = new DefaultClientConfig();
    Client client = Client.create(config);
    WebResource service = client.resource(uri);
    String xml = service.accept(MediaType.TEXT_XML).get(String.class);
    System.out.println("Output as XML: " + xml);
}

and the Exception:

Exception in thread "main"
com.sun.jersey.api.client.ClientHandlerException: java.net.ConnectException: Connection refused: connect
at com.sun.jersey.client.urlconnection.URLConnectionClientHandler.handle(URLConnectionClientHandler.java:151)
at com.sun.jersey.api.client.Client.handle(Client.java:648)     
at com.sun.jersey.api.client.WebResource.handle(WebResource.java:680)   
at com.sun.jersey.api.client.WebResource.access$200(WebResource.java:74)
at com.sun.jersey.api.client.WebResource$Builder.get(WebResource.java:507)
at GetPoint.openweathermapTest1(GetPoint.java:110)
at GetPoint.main(GetPoint.java:142)

Strangely, when I call this link in my web browser, I get the expected data. How can that be? What am I missing here? And how can I fix it? (I tried all three uri and all worked in firefox and not in my programm)

Answer 1

The answer is quite simple: my work computer is behind a proxy and only firefox was using it. With a little proxy magic I was finally able to get the expected result.

Thanks Tom and Jim Garrison for their usefull comments!

Edit: I used the following code to use the proxy:

private static void useProxy(String host, int port)
{
    System.setProperty("http.proxySet", "true");
    System.setProperty("http.proxyHost", host);
    System.setProperty("http.proxyPort", String.valueOf(port));
}

Answer 2

I was facing the same issue. Mine got fixed when i re-checked my JAVA installation. I had both JDK 6 and 7.. this kind of messed up .. so i removed jdk 7 completely and pointed to jdk 6. So command line version , eclipse and server all should point to same jdk.. this resolved the error.